The open-source ide just took the agent features out of the closed forks. eclipse theia 1.75, out…
the open-source ide just took the agent features out of the closed forks. eclipse theia 1.75, out september 10, adds agent plugins, agent memory and mcp apps with interactive ui inside chat.
the platform underneath vs code is now where the agent race is being fought.
Context
EclipseSource's Eclipse Theia 1.75 release post of 10 September 2026 (51 merged pull requests) describes Agent Plugins that bundle skills and MCP servers, an open vendor-neutral standard published as 1.0.0 in August 2026, a built-in opt-in Memory prompt capability that keeps a wiki-style knowledge base per workspace, and MCP Apps, an MCP extension for interactive UI.
The three features are first-party. The plugin and MCP Apps formats are not Theia inventions, per the post. The September 10 date matches the post, while a changelog snippet lists 1.75.0 as 27 August 2026, and the two are unresolved. That the open-source IDE took agent features out of the closed forks, and the VS Code underpinning, are the author's framing and were not established in the text read.
Watch next
- Adoption data or a comparison with other IDE agent features.
Sources
Provenance
The note above is reproduced unedited from the original post, first published on Threads on 20 September 2026 at 22:33 IST. Sources are the papers and datasets the note draws on.
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